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        <h2>尚硅谷全套视频教程</h2>
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                <span class="label label-success">基础</span>
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              <p>网页开发基础，WEB 开发必备技能</p>
              <p>
                <span class="label label-primary">免费</span>
                <span class="label label-success">基础</span>
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              <h4>HTML + CSS基础</h4>
              <p>网页开发基础，WEB 开发必备技能</p>
              <p>
                <span class="label label-primary">免费</span>
                <span class="label label-success">基础</span>
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              <h4>HTML + CSS基础</h4>
              <p>网页开发基础，WEB 开发必备技能</p>
              <p>
                <span class="label label-primary">免费</span>
                <span class="label label-success">基础</span>
              </p>
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          <div class="thumbnail">
            <img src="holder.js/100px200?bg=#c78" alt="...">
            <div class="caption">
              <h4>HTML + CSS基础</h4>
              <p>网页开发基础，WEB 开发必备技能</p>
              <p>
                <span class="label label-primary">免费</span>
                <span class="label label-success">基础</span>
              </p>
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          </div>
        </div>
        <div class="col-lg-3">
          <div class="thumbnail">
            <img src="holder.js/100px200?bg=#c78" alt="...">
            <div class="caption">
              <h4>HTML + CSS基础</h4>
              <p>网页开发基础，WEB 开发必备技能</p>
              <p>
                <span class="label label-primary">免费</span>
                <span class="label label-success">基础</span>
              </p>
            </div>
          </div>
        </div>
        <div class="col-lg-3">
          <div class="thumbnail">
            <img src="holder.js/100px200?bg=#c78" alt="...">
            <div class="caption">
              <h4>HTML + CSS基础</h4>
              <p>网页开发基础，WEB 开发必备技能</p>
              <p>
                <span class="label label-primary">免费</span>
                <span class="label label-success">基础</span>
              </p>
            </div>
          </div>
        </div>
        <div class="col-lg-3">
          <div class="thumbnail">
            <img src="holder.js/100px200?bg=#c78" alt="...">
            <div class="caption">
              <h4>HTML + CSS基础</h4>
              <p>网页开发基础，WEB 开发必备技能</p>
              <p>
                <span class="label label-primary">免费</span>
                <span class="label label-success">基础</span>
              </p>
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